PLEASE HELP ASAP
What is the frequency of the function y = -5cos6x?
A. -5/6
B. 1/6
C. 5
D. 6

Jack has a piece of red ribbon that is two times as long as his piece of blue ribbon. he says that he can use two different equation to find out how long his piece of red ribbon is compared to his piece of blue ribbon is. is he correct? explain his reasoning

45% of the trees in a park are apple trees. there are 27 apple trees in the park. how many trees are in the park in all?

How can you construct perpendicular lines and prove theorems about perpendicular lines